Question 654596
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
quadratic function{{{highlight(y)}}} with roots -1 and 1 and a vertex at (0, -3)
 y = a(x+1)(x-1)   ||using (x,y) ordered pair (0,-3) to solve for a
 {{{-3 = a(0+1)*(0-1)}}}
 {{{-3 = a*1*-1}}}
    -3 = -a
    3 = a 
 y = 3(x+1)(x-1)  0r y = 3(x^2 - 1)